What seems to be the best sealant for sealing fuel fittings? I've read good things about the Permatex Aviation Form-A-Gasket No. 3 Sealant. Are there any better options out there? The fittings on my fuel pressure regulator have a tiny leak and I need to seal them up before something catches on fire.

1973 Cuda 528 all aluminum Hemi, 4 speed, 3.23 Sure-Grip, (JA5) Silver Frost Metallic 1973 Challenger Rallye 340 1985 W150 Power Ram prospector 1986 Camaro IROC-Z 305 tpi